28531342 has 16 divisors (see below), whose sum is σ = 49121280. Its totient is φ = 12175128.

The previous prime is 28531337. The next prime is 28531343. The reversal of 28531342 is 24313582.

It is a self number, because there is not a number n which added to its sum of digits gives 28531342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (3070080).

Almost surely, 2^28531342 is an apocalyptic number.

28531342 is a deficient number, since it is larger than the sum of its proper divisors (20589938).

28531342 is a wasteful number, since it uses less digits than its factorization.

28531342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775.

The product of its digits is 5760, while the sum is 28.

The square root of 28531342 is about 5341.4737666678. The cubic root of 28531342 is about 305.5676680500.

The spelling of 28531342 in words is "twenty-eight million, five hundred thirty-one thousand, three hundred forty-two".